Opto-Adjustable Lens Modulation to Reduce Accommodation Interference
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Solution Overview
Problem
Conventional subjective refraction methods for correcting ametropia are time-consuming, require supervision, and are prone to inaccuracies due to accommodation interference and subjective variability, especially in young patients.
Innovation Solution
An apparatus and method using an opto-adjustable lens controlled by a periodic signal to produce a periodic optical power wave, projecting a visual stimulus with fluctuating defocusing to minimize chromatic effects, allowing patients to intuitively adjust the lens power without accommodation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional subjective refraction methods are used, then the procedure can be performed with simple devices like test glasses or phoropters, but the process is time-consuming and requires supervision of an optometrist or ophthalmologist
Solution Approach 1:
The patent applies periodic action by using a periodic signal to modulate the optical power of the adjustable lens, creating a periodic optical power wave that fluctuates between defocusing states. This periodic modulation allows the patient to intuitively respond to focus changes without requiring continuous supervision or manual adjustment by an optometrist, thereby reducing procedure time while maintaining device simplicity
Solution Approach 2:
The patent implements self-service by enabling the patient to independently adjust the lens power through intuitive responses to the periodic defocusing stimulus. The patient can self-determine the optimal lens power without requiring constant professional supervision, transforming the refraction process from a provider-dominated procedure to a patient-participated process that reduces both time and supervision requirements
2Ease of manufacture
If conventional subjective refraction methods are used, then the procedure is straightforward to implement, but the results are prone to inaccuracies due to accommodation interference and subjective variability
Solution Approach 1:
The periodic optical power wave created by the modulated adjustable lens provides rhythmic defocusing that naturally suppresses accommodation responses. This periodic stimulation makes it difficult for the patient's eye to maintain a fixed accommodation state, thereby eliminating accommodation interference and improving measurement accuracy while keeping the method easy to implement
Solution Approach 2:
The patent changes the parameter of optical power modulation by using periodic signals to vary the lens power dynamically. This parameter change transforms the static refraction measurement into a dynamic process that accounts for temporal variations in accommodation, thereby improving measurement precision by capturing the true refractive state不受accommodation interference
3Adaptability or versatility
If adjustable lenses are used to correct ametropia, then the lens power can be optimized for different patients, but the direction of lens shift is not known a priori, extending the procedure time
Solution Approach 1:
The periodic defocusing stimulus creates a rhythmic pattern that intuitively guides the patient's perception of focus improvement. This periodic action provides temporal information about the direction of lens shift needed, allowing patients to rapidly determine the optimal lens power without requiring extensive trial-and-error adjustment, thus reducing procedure time while maintaining high adaptability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method provides quicker, more precise, and less subjective refraction results with minimal supervision, eliminating accommodation interference and reducing variability in patient responses.
Implementation Method 1
an opto-adjustable lens the optical power of which is adjustable, said opto-adjustable lens being controlled by a periodic signal configured for producing a periodic optical power wave
Implementation Method 2
The periodic signal has an amplitude such that it produces an amplitude of the periodic optical power wave corresponding to a chromatic difference of focus between a first wavelength and a second wavelength of visible light which passes the opto-adjustable lens
Data Source
AI summary
An apparatus for performing optometric measurements includes an opto-adjustable lens, the optical power of which is adjustable, with the lens being controlled by a periodic signal configured for producing a periodic optical power wave over time. The apparatus also includes a component for the adjustment of the mean value of the periodic optical power wave. The apparatus further includes an optical projector system for projecting a plane of the opto-adjustable lens onto a plane external to the apparatus, and in that the periodic signal has an amplitude such that it produces an amplitude of the periodic optical power wave corresponding to a chromatic difference of focus between a first wavelength and a second wavelength of visible light which passes the opto-adjustable lens. A system for the performance of optometric measurements and a method for adjusting the optical power of an adjustable lens are related to the apparatus.